Organic food represents just over 4% of the nation's $760-billion food industry. Food sales as a whole are growing much slower than organics at around 3% annually, according to the Organic Trade Assn.

Organic food represents just over 4% of the nation's $760-billion food industry. Food sales as a whole are growing much slower than organics at around 3% annually, according to the Organic Trade Assn. (Spencer Platt / Getty Images)

Organic food represents just over 4% of the nation's $760-billion food industry. Food sales as a whole are growing much slower than organics at around 3% annually, according to the Organic Trade Assn.Spencer Platt / Getty Images